Stenciling machine



E. G5. GVU'LEY STENCILING MACHINE Original Filed June 24'. 1924 TORI Patented Aug. 9, 1927.

UNITED STATES lPATENT oFFicE.A

EDWARD G. RoWLEY, 0E BELLEVILLE, NEW `jERsEsr, AssIGNoR 'ro UNnERWooD TYPEWRITER COMPANY, 0E NEW YORK, N. Y., A CORPORATION 0E DELAWARE.

r sTENcrLrNG ivrAonnvE.-

Original application filed June 24, 1924, Serial No. 721,982. Divided and this application led December 26,V 1925. j Serial No. 77,867. V

This invention relates to duplicating machines, 1n which a perforated drum is covered with an ink-blanket, saturated with ink applied to the interior of the cylinder and overlaid with a stencil, between which anda pressure-roll the paper to be stenciled is passed.

A feature of the present invention, is the provision of a. work-sheet supporting table which is hinged to the frame of the machine and held, when extended in operative posi-V tion, by a supporting bracket, all parts of which fold automatically within the confines of the frame upon raising the table alongside the cylinder, thus presentingno impediment to the placement of a cover.

Another feature of the invention is the lprovision of a telescopic extension ofthe table which enables the table to accommo` The extenA date sheets of various lengths. sion is slid-ably engaged below the main rportion and has lugs which Contact with a rod fixed in the outer part of the main table, providing an effective alignment. Y f

Still another feature of the invention is the. provision of an angular guide for the work-'sheets which is adjustably and remov ably engaged upon the work-sheetsupporting` table, theguide being provided with a,

and advantages willhere- Figure Zis an end elevational view of. the' machine, showing the work-supporting. table in operative position, parts being broken away to disclose theA structural features, anclj the cylinder supports being shown'in 'dot'- and-dash lines. f f

Figure 3 is a front viewof the work-sup# port table. showing the extension 'in cross-' section-and drawn to an enlarged scale. Figure 4lv is a cross-sect1onal view taken on division of my vco4l view oi the line 4 4' of Figure 2, and showing the worktablesupporting bracket and the stops of the table extension.

In the embodiment shown, thel machine side of the machine, these members being supported on feet 13 resting on any ylevel surface. The raised portions of the frame side 12 converge to a4 central boss 14, bored to receive a fixed plug 15 on which is revolubly mounted a cylinder, generally desig# nated by the numeral 16, in such manner as to be readily removed. The right-hand side frame 11 has divergingQU-shaped upper kelements on which are ymounted revoluble trundles or rolls 17, engaging the cylinder 1S on opposite sides above its center. `A .bird trundle or roll 18, bearing on the cylinder Vat thebottom, isrotatably mounted on a screw`19, in a plane directly below the center of the'cylinder.

respectively at the right and left hand A bracket 2O having an extending handle 21 vis held to the end of the cylinder head by radially extending lugs 32 and 33 integral with the ends of the'bracket.

A gravity actuated stop or pawl 34 having arms 35 and 36 is pivoted on a shouldered screw 37, set in the frame side 11, the stop being normally at rest against a fixed pin 38,. and-.provided with a handle 39.` When the cylinder handle 21, is turned to bring i the cam face of the lug 32 into contact with the arm 36, the stop will tilt upon its pivot, allowing'the lug to pass, and then returnby gravity to its normal position to intercept the 'lug 33, preventing further rotation of the cylinder in clockwise direction, until the stop has been released by: its handle 39. When kthe cylinder is'rotated in an operative, con-` trary direction, the lug passes freely over the arm 35' and striking the arm 36, tilts the. stop, raisingv the arm 35 to engage the inner face ofthe lug 32 stopping the cylinder; however, if a slight momentary cessation of motion of' the cylinder isfmade., auch as is caused by recoil of the lug against the arm, the stop will returnto its normalV position, permitting further rotation of the handle andcylinder.

Carried by lugs and el on the frame sides l1 and l2 are the narrow rearward extensions 42 of a paper-detlector 43, extending upwardly and to the front of the cylinder, the detlector being mainly supported on ledges 44, extending in from the frame sides.

Below the detlector, and extending further toward the front, is a ixed paper-apron 45, supported on lugs 46, extending inwardly from the frame side and to which it is firmly secured.

Normally level with the paper-apron is a work-sheet support table 47, generally rectangular but reduced at its rear corners and formed with downwardly extending cars 48 through which pass pivot screws 49 to enter bosses on the inner surface of the l trame sides; the lateral edges of the table are bent downwardly at a right angle to form Iianges 50, and rigidly connected to their inner sides are angle plates 51 spaced from the under surface of the table to guide and support a telescopic extension plate 52. This extension plate is provided with a downturned flange 53 at its tr'ont edge and near its rear edge is sheared and bent to produce stops 54 to makecontact with a rod 55, fixed in the flanges and angle plates and 5l near the front of the main table 47, thus providing a collapsible table of unusually large area.

Extending in trom the frame side 11 is a boss 5G drilled in register' to receive a rod 57 on which is mounted a link 58 adjacent the boss 56, the tree end ot the link being offset and pivoted at 59 to a strut 60, in turn pivoted on a pin 61, lixed in one of the table flanges 50 to which it is held by a cotter 62.

The tree endv ot the strut 60 is provided with a foot 63 bent at an angle to make a flat contact with the front trame-base bar l0 when the table is extended horizontally. To prevent the toggle-bracket, constituted by the link and str'ut, from moving inward or toward the cylinder upon turning the table down, a projection 64 is formed on the end of the link 5S, on its inner side, the same making contact with the under surface of the adjacent angle plate 5l, and maintaining the pivot 59 just slightly outward or in advance of a straight line between the pivotal axes of the rod 57 and pin 6l.

A paper-gage 65, having a raisedlange 66, is secured to adjusting strips 67 having angle elements 68 riveted to the iiange 66 and clamped, when in adjustment on the table, by thumb-nuts 69engaging threaded posts 70 lixcd in the table, this gage and its attached strips being provided with cushioning material 7l over their entire contacting surt'aces to prevent abrading and damaging the linish of the table.

A pressure-roll 72 feeds the work-sheets past the printing line and into a receiving trough 73 pivoted at the r'ear of the machine, the trough being swung up to a t'olded position when the machine is not in use.

The pressure-roll 72 is oi a soft elastic nature, and is mounted in the ends of arms 74 pivotcd on therod 57. The arms 7 a are ot such length as to locate the pressure-roll 72 directly below the axis ot' the cylinder 16.

Variations may be resorted to within the scope of the invention, and portions of the improvements may be used without others.

Having thus described my invention, I claim:

l. In a duplicating machine, the combination with a frame, a stencil cylinder revoluble therein, a pressure roll, and a paperapron fixed in the trame to deliver sheets between the cylinder and roll, ot a papertable hinged in the trame to swing. from the level of the apron to reston the cylinder, and a toggle bracket to support the table when in its operative position, said bracket operating automatically when the table is raised or lowered.

2. In a duplicating machine, the combination with a trame, a stencil cylinder revoluble therein, a pressure roll, and a paperapron fixed inthe trame to deliver sheets between the cylinder and roll, of' a papertable hinged in the 'frame to swing from the level of the apron to rest on the cylinder, and a bracket to support the table when in its operative position, said bracket folding automatically within the ,contour of the frame when the table is raised and assuming an operative position when the table is lowered. Y

3. In a duplicating machine, the combination with a frame, a stencil cylinder revoluble therein, a pressure roll, and a paperapron fixed in the trame to deliverV sheets between the cylinder and roll, ot a papertable hinged in .theframe to swing from the level of the apron to rest on the cylinder, and a bracket comprising two elements attached respectively to the table and i'rame and to each other, the elements ot said bracket moving automatically with the table into either a supporting position or to told with it wholly within the contour oli the frame.

i- In a duplicating machine, the combination with a frame, a stencil cylinder revoluble therein, a pressure roll, and a paperapron fixed in the trame to deliver sheets between the cylinder and roll,-o't a papertable hinged in the frame to swing from an operative position to a rest position against the cylinder, the table having flanged side edges, and a support bracket comprised of a strut pivoted to one of the table flanges at one end and having-a foot to contact with the frame at the other end, and a link pivoted to the frame below the pivotal point ot the table and to the strut, whereby both lim Biff

strut and link are folded against the bottom of said table wh, `he table is raised.

5. ln a duplica ng niachine, the combination with a- 'lirarn-e, 'Y cylinder ievoluble therein, a press a paperapi'on lined in t' o delivei' sheets between the cylinder roll, et a papertable hinged in the e inginto `ferative position,

.e position.

ine, the combina- P stencilA cylinder revo 'e yell, and a paper- .e to vdeliver sheets (S. ln e, dnplieatinjg' niae tion with a lnble therein a 7 apron lined in between the Cyl roll, of a papelne to swing into l er inoperative posi'ion, 'afliet eonipiiflfed of a 3 ,fl a linl Divoted 7ith the stint, the strut is hel-.d

table hinged either an on' whereb),Y the against the fi en the "C: )le is in an operative posi ne sJ L when means en 'frein 'toldi 7. ln dul n-; tion 'with a i revoluble therein. .ipe

apron iixed between 'the the 'traine oted te the a link piv- Llie pivotal point of the table and lieiebvboh strut and link are if he bottoni d afl piojeetion n between plane of the ax( connections oi' the 8. In a duplicating inaehine, the combination with frame and a stencil cylinder revoluble therein, of a paper-table hinged in the frame to swing,Y into operative oi inoperative positions relative to the cylinder, and a support for the table ntoniatically eX- tensible when the table is moved i o an opei'ative position and antoinaticall, ifoldable when the table is raised into an inoperative position.

9. In a duplicating machine, the combination with av -traine, a stencil cylinder revoluble therein, and a work-support table to deliver sheets to the cylinderl said table having downturned lateral flanges, oa lod fixed to extend between the flanges near the front of the table, a plate slidable below said table,l said plate having a downtnrned front flange, and integral projections neai the rear of the plate to Contact wiih said rod when the plate is drawn outwardly.

10. ln a duplicating machine, the conibination with a freine, a stencil cylinder rev- 'olnble therein, and a wei'l:-snppoi't table having its side edges flanged downwai'dly, of strips having a right angle cross-section [ined te the inner siii-tacos ot the iianges, said sti-ips l eing spaced ini'oin the under snrlface ot' the table, a plate telescopically slidable in the inentiened spaces, said plate e);- tending troni side to side of the table and having a downtnrned front edge, a i'od secured at its ends in said strips flanges yneatl the yiigontot' the tabl and lugs integral engaged between said strips and table,

ineans facilitatingw extraction of the plate, and means limiting witl'idrawal, said plate automaticallgv receding when the table is raised to an inoperative position.

' EDVARD Gr. ROVLEY. 

